Supercharger apparatus for internal combustion engine

Abstract

A supercharger apparatus is provided which comprises a reciprocating type internal combustion engine having a block, an exhaust passage and an intake passage, and also having an exhaust turbine which is provided in said exhaust passage. A compressor is provided in said intake passage, along with a shaft for interconnecting said turbine and said compressor, the shaft being supported in a bearing hole which is formed in the engine block. A lubrication oil passage, which is in communication with the bearing hole, is formed in the engine block.

What is claimed is: 
     
       1. A supercharger apparatus for a vehicle comprising a reciprocating type internal combustion engine having a block, an exhaust passage and an intake passage, an exhaust port connected to said exhaust passage and an intake port connected to said intake passage, wherein said exhaust port and said intake port are disposed on opposite sides of said engine block, such that there is a crossflow therebetween, and having an exhaust turbine provided in said exhaust passage, a compressor provided in said intake passage and a shaft other than the engine crankshaft, extending through said block for interconnecting said turbine and said compressor, said shaft being supported in a single bearing hole formed in the engine block and said turbine being disposed in front of said engine and exposed to air flow caused by movement of the vehicle, for cooling purposes, and a lubrication oil passage, which is in communication with the bearing hole, being formed in said engine block. 
     
     
       2. A supercharger apparatus as claimed in claim 1 wherein said exhaust turbine and said compressor are disposed on opposite sides of said engine block such that they are separated from one another. 
     
     
       3. A supercharger apparatus as claimed in claim 2 wherein the engine is a straight type multi-cylinder engine, wherein plural cylinders are disposed in line between said opposite sides and extend at a right angle thereto, and wherein said bearing hole extends between said opposite sides through an intermediate portion of said engine block between said cylinders. 
     
     
       4. A supercharger apparatus as claimed in claim 2 wherein the engine is a V-type multi-cylinder engine, wherein plural cylinders are disposed in a V form between said opposite sides, and wherein said bearing hole extends between said opposite sides through a bottom portion of the V formed between said cylinders.